Christine Hahn MD


Typical Smallpox Vaccine Reaction

Source: U.S. Centers for Disease Control and Prevention (CDC). Available online: http://www.bt.cdc.gov The pictures show a typical reaction to the smallpox vaccine. First, a small bump (papule) forms at the vaccine site 3 to 5 days after vaccination. This becomes a pus-filled area (pustule) a few days later. The pustule…

Flu Vaccine Myths

Many people choose not to have the influenza vaccine because of myths they believe about the disease or the vaccine. Myth: Influenza is a minor illness. Truth: Influenza and its complications caused from 3,000 to 49,000 deaths each year from 1976 to 2006 in the United States. 1 Myth: The vaccine causes the flu. Truth…

Chickenpox and Smallpox Rash Comparison

Source: The U.S. Centers for Disease Control and Prevention (CDC). Differences between chickenpox and smallpox Chickenpox Smallpox How initial symptoms differ 0 to 2 days of mild illness pass before the rash develops. 2 to 3 days of severe illness pass before the rash develops. Lesions first appear on the face or trunk…

Encephalitis

Encephalitis is an inflammation (swelling and irritation) of the brain that is usually the result of a viral infection. If not treated immediately, encephalitis can alter brain function and become life-threatening. The most common symptoms of encephalitis are fever, severe headache, and confusion. Other symptoms may…

Lyme Disease Rash

One symptom of Lyme disease is a red rash (called erythema migrans). The rash usually starts as a small red area and then expands over several days. The rash occurs at the site of the tick bite and usually gets bigger over time. Sometimes the rash clears in the center, so that it looks like a bull’s-eye. About half the…